Question

What values will be displayed in JOptionPane when the following code is executed?

int a = 5, b = 2 ; 

while (a < 20) 

{ 

a = a + b ; b = a - b ; 

JOptionPane. 

showMessageDialog(null,a) ; 

}

Answer 1

No value will be displayed in JOptionPane because it will give exception in thread ‘main’ due to null.